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Improve and fix some error handling for REINDEX INDEX/TABLE CONCURRENTLY

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This improves the user experience when it comes to restrict several
flavors of REINDEX CONCURRENTLY.  First, for INDEX, remove a restriction
on shared relations as we already check after catalog relations.  Then,
for TABLE, add a proper error message when attempting to run the command
on system catalogs.  The code path of CREATE INDEX CONCURRENTLY already
complains about that, but if a REINDEX is issued then then the error
generated is confusing.

While on it, add more tests to check restrictions on catalog indexes and
on toast table/index for catalogs.  Some error messages are improved,
with wording suggestion coming from Tom Lane.

Reported-by: Tom Lane
Author: Michael Paquier
Reviewed-by: Tom Lane
Discussion: https://postgr.es/m/23694.1556806002@sss.pgh.pa.us
This commit is contained in:
Michael Paquier 2019-05-10 08:18:46 +09:00
parent 24c19e9f66
commit 508300e2e1
3 changed files with 27 additions and 19 deletions
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22
src/backend/commands/indexcmds.c
View File

@ -2743,6 +2743,12 @@ ReindexRelationConcurrently(Oid relationOid, int options)
MemoryContextSwitchTo(oldcontext);
/* A system catalog cannot be reindexed concurrently */
if (IsCatalogRelationOid(relationOid))
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot reindex a system catalog concurrently")));
/* Open relation to get its indexes */
heapRelation = table_open(relationOid, ShareUpdateExclusiveLock);
@ -2756,13 +2762,13 @@ ReindexRelationConcurrently(Oid relationOid, int options)
if (!indexRelation->rd_index->indisvalid)
ereport(WARNING,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot reindex concurrently invalid index \"%s.%s\", skipping",
errmsg("cannot reindex invalid index \"%s.%s\" concurrently, skipping",
get_namespace_name(get_rel_namespace(cellOid)),
get_rel_name(cellOid))));
else if (indexRelation->rd_index->indisexclusion)
ereport(WARNING,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot reindex concurrently exclusion constraint index \"%s.%s\", skipping",
errmsg("cannot reindex exclusion constraint index \"%s.%s\" concurrently, skipping",
get_namespace_name(get_rel_namespace(cellOid)),
get_rel_name(cellOid))));
else
@ -2802,7 +2808,7 @@ ReindexRelationConcurrently(Oid relationOid, int options)
if (!indexRelation->rd_index->indisvalid)
ereport(WARNING,
(errcode(ERRCODE_INDEX_CORRUPTED),
errmsg("cannot reindex concurrently invalid index \"%s.%s\", skipping",
errmsg("cannot reindex invalid index \"%s.%s\" concurrently, skipping",
get_namespace_name(get_rel_namespace(cellOid)),
get_rel_name(cellOid))));
else
@ -2831,17 +2837,11 @@ ReindexRelationConcurrently(Oid relationOid, int options)
{
Oid heapId = IndexGetRelation(relationOid, false);
/* A shared relation cannot be reindexed concurrently */
if (IsSharedRelation(heapId))
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("concurrent reindex is not supported for shared relations")));
/* A system catalog cannot be reindexed concurrently */
if (IsCatalogRelationOid(heapId))
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("concurrent reindex is not supported for catalog relations")));
errmsg("cannot reindex a system catalog concurrently")));
/* Save the list of relation OIDs in private context */
oldcontext = MemoryContextSwitchTo(private_context);
@ -2869,7 +2869,7 @@ ReindexRelationConcurrently(Oid relationOid, int options)
/* Return error if type of relation is not supported */
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("cannot reindex concurrently this type of relation")));
errmsg("cannot reindex this type of relation concurrently")));
break;
}

17
src/test/regress/expected/create_index.out
View File

@ -1967,7 +1967,7 @@ INSERT INTO concur_reindex_tab3 VALUES (3, '[1,2]');
REINDEX INDEX CONCURRENTLY concur_reindex_tab3_c2_excl; -- error
ERROR: concurrent index creation for exclusion constraints is not supported
REINDEX TABLE CONCURRENTLY concur_reindex_tab3; -- succeeds with warning
WARNING: cannot reindex concurrently exclusion constraint index "public.concur_reindex_tab3_c2_excl", skipping
WARNING: cannot reindex exclusion constraint index "public.concur_reindex_tab3_c2_excl" concurrently, skipping
INSERT INTO concur_reindex_tab3 VALUES (4, '[2,4]');
ERROR: conflicting key value violates exclusion constraint "concur_reindex_tab3_c2_excl"
DETAIL: Key (c2)=([2,5)) conflicts with existing key (c2)=([1,3)).
@ -2092,10 +2092,15 @@ BEGIN;
REINDEX TABLE CONCURRENTLY concur_reindex_tab;
ERROR: REINDEX CONCURRENTLY cannot run inside a transaction block
COMMIT;
REINDEX TABLE CONCURRENTLY pg_database; -- no shared relation
ERROR: concurrent index creation on system catalog tables is not supported
REINDEX TABLE CONCURRENTLY pg_class; -- no catalog relations
ERROR: concurrent index creation on system catalog tables is not supported
REINDEX TABLE CONCURRENTLY pg_class; -- no catalog relation
ERROR: cannot reindex a system catalog concurrently
REINDEX INDEX CONCURRENTLY pg_class_oid_index; -- no catalog index
ERROR: cannot reindex a system catalog concurrently
-- These are the toast table and index of pg_authid.
REINDEX TABLE CONCURRENTLY pg_toast.pg_toast_1260; -- no catalog toast table
ERROR: cannot reindex a system catalog concurrently
REINDEX INDEX CONCURRENTLY pg_toast.pg_toast_1260_index; -- no catalog toast index
ERROR: cannot reindex a system catalog concurrently
REINDEX SYSTEM CONCURRENTLY postgres; -- not allowed for SYSTEM
ERROR: concurrent reindex of system catalogs is not supported
-- Warns about catalog relations
@ -2144,7 +2149,7 @@ DROP INDEX concur_reindex_ind5_ccnew;
DELETE FROM concur_reindex_tab4 WHERE c1 = 1;
-- The invalid index is not processed when running REINDEX TABLE.
REINDEX TABLE CONCURRENTLY concur_reindex_tab4;
WARNING: cannot reindex concurrently invalid index "public.concur_reindex_ind5", skipping
WARNING: cannot reindex invalid index "public.concur_reindex_ind5" concurrently, skipping
NOTICE: table "concur_reindex_tab4" has no indexes
\d concur_reindex_tab4
Table "public.concur_reindex_tab4"

7
src/test/regress/sql/create_index.sql
View File

@ -838,8 +838,11 @@ DROP TABLE concur_reindex_part;
BEGIN;
REINDEX TABLE CONCURRENTLY concur_reindex_tab;
COMMIT;
REINDEX TABLE CONCURRENTLY pg_database; -- no shared relation
REINDEX TABLE CONCURRENTLY pg_class; -- no catalog relations
REINDEX TABLE CONCURRENTLY pg_class; -- no catalog relation
REINDEX INDEX CONCURRENTLY pg_class_oid_index; -- no catalog index
-- These are the toast table and index of pg_authid.
REINDEX TABLE CONCURRENTLY pg_toast.pg_toast_1260; -- no catalog toast table
REINDEX INDEX CONCURRENTLY pg_toast.pg_toast_1260_index; -- no catalog toast index
REINDEX SYSTEM CONCURRENTLY postgres; -- not allowed for SYSTEM
-- Warns about catalog relations
REINDEX SCHEMA CONCURRENTLY pg_catalog;